Question

Read the following and answer

Nitrogenous materials formed due to metabolic activities are need to be removed. The biological

process involved in the removal of these harmful metabolic wastes from the body is called excretion. Different organisms use varied strategies to do this. Many unicellular organisms remove these wastes by simple diffusion from the body surface into the surrounding water while complex multi-cellular organisms use specialised organs to perform the same function

18.1 The excretory system of human beings include

(a) a pair of kidneys, a pair of ureters, a urinary bladder and a urethra

(b) a pair of kidneys, a pair of urinary bladders, a ureter, and a urethra

(c) a pair of kidneys, a pair of ureters, a pair of urinary bladders and a urethra

(d) a kidney, a ureter a urinary bladder and a urethra​

Answer 1

A pair of kidneys, a pair of ureters, a urinary bladder, and a urethra.

Explanation:

• The excretory system mainly consists of kidneys and bladder.
• The waste materials produced in the boy are removed through this system.
• waste products in liquid form blood are gathered from blood and then added to the urethra.
• Urea and other solid materials are filtered in the kidney.

Answer 2

Answer:

a is the correct answer because the exceratory system include 2 kidney,2 ureters,a urinary bladder,and urethra